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Human vision vs computer power

2 April 2012 Last updated at 17:42 BST

The human eye is capable of processing visual information far more quickly than any computer.

While the human brain can instantly recognise objects or human faces, a computer has to add together the information pixel by pixel.

Horizon: The Hunt for AI is on BBC Two at 21:00 BST on Tuesday 3 April. Watch online (UK only) or see more clips at the above link.